Amy and Dillon have kept pretty busy as the big day draws near. On Sunday, Amy posted this picture from her '90s-themed bachelorette party, writing, "How fabulous!"

And with that, the countdown was officially on. Amy followed up with a photo on Thursday, with the caption, "3 days!!!?? the night he proposed!! only 2 1/2 months ago!!! Sunday can't get here fast enough!"

As for Josh Duggar, the disgraced former 19 Kids and Counting star was missing from the family photo celebrating the engagement, and is expected to miss the wedding as well due to the fact that he is currently seeking treatment at Reformers Unanimous in Rockford, Illinois, in light of his recent troubles.